/* =========================================================
   BillFlow — custom design system
   ========================================================= */
:root{
  --brand:#6d5efc; --brand-2:#a78bfa; --brand-ink:#4b3ce0;
  --ink:#0f1222; --soft:#6b7192; --line:#e9e8f5; --bg:#f5f6fd;
  --card:#ffffff; --ok:#16a34a; --warn:#d97706; --danger:#dc2626; --info:#2563eb;
  --shadow:0 18px 40px -20px rgba(70,60,180,.28);
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
  background:var(--bg); color:var(--ink); font-size:14.5px; line-height:1.55;
}
a{color:var(--brand-ink);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0 0 .4em;line-height:1.25}

/* ---------- Layout ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{
  width:250px;flex-shrink:0;color:#e8e7ff;position:sticky;top:0;height:100vh;
  background:linear-gradient(185deg,#241b57 0%,#1a1440 100%);
  padding:22px 14px;overflow-y:auto;
}
.sidebar .brand{display:flex;align-items:center;gap:11px;padding:6px 10px 20px}
.sidebar .brand .mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));font-weight:800;color:#fff;font-size:20px}
.sidebar .brand b{font-size:18px;color:#fff;letter-spacing:.3px}
.nav-group{margin:14px 0 4px;padding:0 12px;font-size:11px;letter-spacing:1.5px;
  text-transform:uppercase;color:#8b83c9}
.sidebar a.nav{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:10px;
  color:#c9c6f0;font-weight:500;margin:2px 0;transition:.15s}
.sidebar a.nav:hover{background:rgba(255,255,255,.07);color:#fff;text-decoration:none}
.sidebar a.nav.active{background:linear-gradient(135deg,var(--brand),var(--brand-ink));color:#fff;
  box-shadow:0 8px 18px -8px rgba(109,94,252,.8)}
.sidebar a.nav .ic{width:18px;text-align:center;font-size:15px;opacity:.95}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 28px;background:rgba(255,255,255,.75);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar .page-title{font-size:19px;font-weight:700}
.topbar .right{display:flex;align-items:center;gap:14px}
.avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;display:grid;place-items:center;font-weight:700}
.content{padding:26px 28px;flex:1}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:7px;border:0;cursor:pointer;font-weight:600;
  font-size:14px;padding:10px 18px;border-radius:11px;transition:.18s;text-decoration:none;line-height:1}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-ink));color:#fff;
  box-shadow:0 12px 22px -12px rgba(109,94,252,.9)}
.btn-primary:hover{color:#fff;box-shadow:0 16px 26px -12px rgba(109,94,252,1)}
.btn-light{background:#f0eefe;color:var(--brand-ink)}
.btn-ghost{background:transparent;color:var(--soft);border:1px solid var(--line)}
.btn-danger{background:#fdecec;color:var(--danger)}
.btn-sm{padding:7px 12px;font-size:12.5px;border-radius:9px}
.btn-block{width:100%;justify-content:center}

/* ---------- Cards ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow)}
.card-pad{padding:22px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:18px 22px;border-bottom:1px solid var(--line)}
.card-head h3{margin:0;font-size:16px}

/* ---------- Stat cards ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:24px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.stat .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:20px;margin-bottom:14px}
.stat .lbl{color:var(--soft);font-size:13px;font-weight:500}
.stat .val{font-size:26px;font-weight:800;margin-top:2px;letter-spacing:-.5px}
.stat .sub{font-size:12px;margin-top:6px;color:var(--soft)}
.i-violet{background:#efe9ff;color:#6d5efc}.i-green{background:#e6f8ee;color:#16a34a}
.i-amber{background:#fdf1dd;color:#d97706}.i-red{background:#fdeaea;color:#dc2626}
.i-blue{background:#e7f0ff;color:#2563eb}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto}
table.tbl{width:100%;border-collapse:collapse;font-size:14px}
table.tbl th{ text-align:left;padding:13px 18px;color:var(--soft);font-weight:600;font-size:12px;
  letter-spacing:.4px;text-transform:uppercase;border-bottom:1px solid var(--line);white-space:nowrap}
table.tbl td{padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:middle}
table.tbl tbody tr:hover{background:#faf9ff}
table.tbl tbody tr:last-child td{border-bottom:0}
.tbl .muted{color:var(--soft);font-size:13px}
.tbl .strong{font-weight:700}

/* ---------- Badges ---------- */
.badge{display:inline-block;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600}
.badge-gray{background:#eef0f6;color:#5b6172}.badge-green{background:#e6f8ee;color:#158a43}
.badge-amber{background:#fdf1dd;color:#b4690e}.badge-red{background:#fdeaea;color:#c62828}
.badge-blue{background:#e7f0ff;color:#1e56c9}.badge-purple{background:#f0e9ff;color:#6d3ce0}

/* ---------- Forms ---------- */
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.form-grid .full{grid-column:1 / -1}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:600;font-size:13px;color:#3a3f57}
.field .hint{font-size:12px;color:var(--soft)}
input,select,textarea{font-family:inherit;font-size:14px;padding:11px 13px;border:1px solid var(--line);
  border-radius:10px;background:#fff;color:var(--ink);width:100%;transition:.15s;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(109,94,252,.12)}
textarea{resize:vertical;min-height:88px}
.form-actions{display:flex;gap:12px;margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}

/* ---------- Flash ---------- */
.flash{padding:13px 18px;border-radius:12px;margin-bottom:16px;font-weight:500;display:flex;
  align-items:center;gap:10px;border:1px solid}
.flash.success{background:#eafaf0;border-color:#b8ebc9;color:#1c7a44}
.flash.error{background:#fdecec;border-color:#f5b8b8;color:#a12525}
.flash.info{background:#e7f0ff;border-color:#bcd4ff;color:#1e56c9}

/* ---------- Page header ---------- */
.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.page-head .h{font-size:22px;font-weight:800;letter-spacing:-.3px}
.page-head .desc{color:var(--soft);font-size:13.5px;margin-top:2px}

/* ---------- Misc ---------- */
.row-actions{display:flex;gap:8px}
.icon-btn{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;border:1px solid var(--line);
  background:#fff;color:var(--soft);cursor:pointer;transition:.15s;text-decoration:none}
.icon-btn:hover{color:var(--brand);border-color:var(--brand);text-decoration:none}
.icon-btn.del:hover{color:var(--danger);border-color:var(--danger)}
.empty{text-align:center;padding:60px 20px;color:var(--soft)}
.empty .big{font-size:46px;margin-bottom:10px;opacity:.5}
.search-bar{display:flex;gap:10px;margin-bottom:18px;flex-wrap:wrap}
.search-bar input{max-width:320px}
.pill{display:inline-flex;gap:6px;align-items:center;background:#f0eefe;color:var(--brand-ink);
  padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:600}
.two-col{display:grid;grid-template-columns:1fr 380px;gap:22px;align-items:start}
.mini-list{list-style:none;margin:0;padding:0}
.mini-list li{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px solid var(--line)}
.mini-list li:last-child{border-bottom:0}

/* ---------- Auth pages ---------- */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr}
.auth-art{background:linear-gradient(160deg,#2a2166,#4b3ce0 55%,#6d5efc);color:#fff;
  padding:56px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.auth-art .blob{position:absolute;border-radius:50%;filter:blur(10px);opacity:.35}
.auth-art h2{font-size:34px;line-height:1.15;max-width:420px}
.auth-art p{max-width:400px;color:#d7d3ff;font-size:15px}
.auth-feat{display:flex;flex-direction:column;gap:14px;margin-top:10px}
.auth-feat div{display:flex;gap:10px;align-items:center;color:#e7e4ff}
.auth-form{display:grid;place-items:center;padding:40px}
.auth-card{width:100%;max-width:400px}
.auth-card .logo{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:24px;margin-bottom:20px}
.text-c{text-align:center}.mt{margin-top:16px}.mb{margin-bottom:16px}
.divider{height:1px;background:var(--line);margin:20px 0}

/* invoice item builder */
.items-table{width:100%;border-collapse:collapse}
.items-table th{font-size:12px;text-transform:uppercase;color:var(--soft);text-align:left;padding:8px}
.items-table td{padding:6px}
.items-table input,.items-table select{padding:9px 10px}
.totals-box{margin-left:auto;max-width:340px;margin-top:16px}
.totals-box .row{display:flex;justify-content:space-between;padding:8px 0}
.totals-box .grand{border-top:2px solid var(--ink);margin-top:6px;padding-top:12px;font-size:19px;font-weight:800}

@media(max-width:1100px){.stats{grid-template-columns:repeat(2,1fr)}.two-col{grid-template-columns:1fr}}
@media(max-width:820px){
  .sidebar{position:fixed;left:-260px;z-index:100;transition:.25s}
  .sidebar.open{left:0}
  .form-grid{grid-template-columns:1fr}
  .auth-wrap{grid-template-columns:1fr}.auth-art{display:none}
  .menu-toggle{display:grid!important}
}
.menu-toggle{display:none;width:40px;height:40px;border-radius:10px;place-items:center;
  border:1px solid var(--line);background:#fff;cursor:pointer;font-size:18px}